.header-wrapper{
    background-color: #fff;
    border-bottom: 1px solid #e8e8e8;
    padding: 12px 0;
}

.header{
    display: flex;
    margin:0 24px;

    .left{
        flex:1;

        h1{
            font-size: 18px;
            margin-bottom: 0;
            line-height: 1;  // 字体大小的100%
        }
    }

    .right{
        flex:1;
        text-align: right;
    }

    .main{
        flex: 1;
        text-align: center;
    }
}